Thanks for the helpful and informative reply – I must check Google out sometime (is it a new service) 🙂
I have looked on Google but never seen this software option, but thanks anyway for pointing it out.
It seems to do exactly what I’m looking for though – would be interested to hear if anyone has used it
WP has its own membership thing. You can say that users have to sign up to comment, or sign up and become author. All that is already there. I never heard of anyone wanting paid membership, but it seems that the plugin I ran into, does what you want (for a fee, nice irony!). I suppose there are also free similar plugins. Just have another peek at that brand new service called Google.